Altitude capability calculation methods based on minimum flight cost

Based on considing wind speed effect on cruise Mach number, the computational methods of cruise Mach number and altitude capability were proposed, the minimum flight cost was their objective function, and the effective extents of wind speed, mass, temperature on altitude capability were analysed. Analysis results show that the effective extent of mass on altitude capability is great, the effective extent of wind speed on thrust-limited altitude is great, the effective extent of certrobaric location on maneuvering capability limited altitude is great. The maximum error is less than 1% between the computational results by the methods and the computational results by INFLT software without wind, the methods are feasible.